Test Outline:
1. Work ( questions using basic equation)
2. Kinetic, Gravitational Potential and Elastic Potential Energy
3. Conservation of Mechanical Energy (problems)
4.Power (Power = energy used/elapsed time)
5. Societal issues and environmental impactss of different types of energy types: solar, hydroelectric, coal, geothermal etc. (period 1 class only)
6. Thermal energy (specific heat capacity and latent heat problems)
7. Ideal Gas Law (period 5 class only). Two problems involving a basic application of this law.
Calculations:
1. An applied force of 20 N accelerates a block across a level, frictionless surface from rest to a velocity of 8.0 m/s in a time of 2.5 s. Calculate the work done by this force. Answer = 200 J
2. (a) Calculate the work done by a horse that exerts an applied force of 100 N on a sleigh, if the harness makes an angle of 30 degrees with the ground, and the sleigh moves 30 m across a flat, level ice surface. (frictinless) Answer = 2 600 J
(b) Repeat question 2(a) assuming coefficient of friction is 0.2 and a sled mass of 10 kg. (Answer = _____ J)
3. A 5.0 g pellet is placed in the barrel of a toy gun and is propelled by a spring of force constant 50 N/m that has been compressed 20 cm and then released. Calculate the maximum velocity of the pellet when shot horizontally.
Answer = 20 m/s
4. (a) A 70 kg diver jumps from a 12 m tower with no initial velocity. With what velocity does he hit the water? Answer: 15 m/s
(b) The same diver gives himself an initial upward velocity of 5 m/s. What would his impact velocity be? Answer: 16 m/s. (hint: kinetic energy is a scalar, so the upward direction can be ignored)
5. A 51 kg student climbs 3.0 m up a ladder in 4.7 s. Calculate the power used for the climb, where Power = Energy used/time elapsed Answer =350 W
6. Be prepared to know about the advantages and disadvantages of using fossil fuels as an energy resource to generate electricty compared to renewable types of fuels.
7. Calculate the amount of energy needed to evaporate 5.0 g of water, if the latent heat of vaporization is 2.26 EE6 J/kg (Answer = 110,000 J)
8. 100 g of brass (specific heat capacity 380 J/kg C) at 100 C is added to a 250 mL beaker of water at 20 C. (specific heat capcity water is 4 180 J/kg C). Calculate the final temperature of the mixture. (Answer = 22.7 C)